Kim Hyung-soo, better known by his stage name K.Will (Korean: 케이윌), is a South Korean singer. The name is a combination of the first letter 'K' of his last name 'Kim' and the English word 'Will', which means will. He debuted in 2007 and has since become known for his chart-topping ballads. He has also been dubbed the "Prince of OST" for his frequent Korean drama soundtrack appearances.

Kim Da-som, better known mononymously as Dasom, is a South Korean singer and actress. She is best known as a former member of South Korean girl group Sistar and formerly under Starship Entertainment. She has acted in films and television dramas, including Family (2012–2013), Melody of Love (2013–2014), The Virtual Bride (2015), Sister is Alive (2017) and He Is Psychometric (2019).